A display device includes: a pixel array unit with pixel circuits disposed in matrix form, the pixel circuit including a driving transistor, an electro-optic element, a storage capacitor, and a sampling transistor, with the electro-optic element emitting light by generating a driving current based on information stored in the storage capacitor at the driving transistor to be applied to the electro-optic element; and a control unit, of which the output stage includes a buffer transistor, to output a pulse signal for driving the pixel array unit from the buffer transistor; wherein the pixel array unit and the control unit are formed with long laser beam irradiation to be scanned in the vertical direction or horizontal direction; and wherein with the control unit, the size of the buffer transistor is equal to or greater than the pixel pitch in the scanning direction of the laser beam.
Legal claims defining the scope of protection, as filed with the USPTO.
1. A display device comprising: a plurality of pixel circuits disposed in a matrix including a plurality of rows; a scanner circuit including an output stage that includes a first transistor and a second transistor serially connected between a first line and a second line, the output stage being configured to output a pulse signal from a node between the first transistor and the second transistor; a scanning line extending in a row direction of the matrix, and directly connected to the node of the output stage, the scanning line being configured to propagate the pulse signal for driving the pixel circuits in one of the plurality of rows of the matrix, wherein each of the pixel circuits in said one of the plurality of rows includes: a storage capacitor configured to store a voltage corresponding to an image signal, a sampling transistor including a gate electrode connected to the scanning line, and configured to sample the image signal based on the pulse signal supplied from the scanning line, and a driving transistor configured to control a driving current for a light emitting element based on the voltage stored in the storage capacitor, wherein the scanner circuit is disposed adjacent to the plurality of pixel circuits on both sides of the plurality of pixel circuits, in the row direction, a respective channel of each of the first transistor and the second transistor is divided into a plurality of regions, and a total channel width of each of the first transistor and the second transistor is respectively greater than a pixel pitch in a column direction of the matrix.
2. The display device according to claim 1 , wherein each of the first transistor and the second transistor has a multi-finger configuration.
3. The display device according to claim 1 , wherein the first and the second transistors are arranged such that a direction of width of the channel of each of the first transistor and the second transistor corresponds to the column direction of the matrix.
5. The display device according to claim 1 , wherein the first transistor and the second transistor of the output stage serve as an inverter-type buffer.
6. The display device according to claim 5 , wherein the first transistor is an N-type transistor, and the second transistor is a P-type transistor.
7. The display device according to claim 1 , wherein each of the pixel circuits is configured to perform at least one of a threshold correction operation or a mobility correction operation.
8. The display device according to claim 7 , wherein each of the pixel circuits is configured to perform both of the threshold correction operation and the mobility correction operation.
9. The display device according to claim 7 , wherein a period of said at least one of the threshold correction operation or the mobility correction operation is dependent on the pulse signal.
10. The display device according to claim 1 , wherein the scanning line includes molybdenum.
11. A display device comprising: a plurality of pixel circuits disposed in a matrix including a plurality of rows; a scanner circuit including an output stage that includes a first transistor and a second transistor serially connected between a first line and a second line, the output stage being configured to output a pulse signal from a node between the first transistor and the second transistor; a scanning line extending in a row direction of the matrix, and directly connected to the node of the output stage, the scanning line being configured to propagate the pulse signal for driving the pixel circuits in one of the plurality of rows of the matrix, wherein each of the pixel circuits in said one of the plurality of rows includes: a storage capacitor configured to store a voltage corresponding to an image signal, a sampling transistor including a gate electrode connected to the scanning line, and configured to sample the image signal based on the pulse signal supplied from the scanning line, and a driving transistor configured to control a driving current for a light emitting element based on the voltage stored in the storage capacitor, wherein the scanner circuit is disposed adjacent to the plurality of pixel circuits on both sides of the plurality of pixel circuits, in the row direction, a respective channel of each of the first transistor and the second transistor is divided into a plurality of regions, a total channel width of each of the first transistor and the second transistor is respectively greater than a pixel pitch in a column direction of the matrix, the channel of each of the first transistor and the second transistor includes a polysilicon layer formed with laser beam irradiation; and characteristics of each of the first transistor and the second transistor are dependent upon radiation received during at least four separated independent laser radiation application steps during the laser beam irradiation.
12. The display device according to claim 11 , wherein each of the first transistor and the second transistor has a multi-finger configuration.
13. The display device according to claim 11 , wherein the first and the second transistors are arranged such that a direction of width of the channel of each of the first transistor and the second transistor corresponds to the column direction of the matrix.
15. The display device according to claim 11 , wherein the first transistor and the second transistor of the output stage serve as an inverter-type buffer.
16. The display device according to claim 15 , wherein the first transistor is an N-type transistor, and the second transistor is a P-type transistor.
17. The display device according to claim 11 , wherein each of the pixel circuits is configured to perform at least one of a threshold correction operation or a mobility correction operation.
18. The display device according to claim 17 , wherein each of the pixel circuits is configured to perform both of the threshold correction operation and the mobility correction operation.
19. The display device according to claim 17 , wherein a period of at least one of the threshold correction operation or the mobility correction operation is dependent on the pulse signal.
20. The display device according to claim 11 , wherein the scanning line includes molybdenum.
21. The display device according to claim 11 , wherein the laser beam irradiation is applied along the column direction or the row direction.
Cooperative Patent Classification codes for this invention. Click any code to explore related patents in that topic.
October 19, 2018
October 6, 2020
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